/** \mainpage AVRISP MKII Programmer Project
*
- * \section SSec_Compat Project Compatibility:
+ * \section Sec_Compat Project Compatibility:
*
* The following list indicates what microcontrollers are compatible with this project.
*
* - Series 4 USB AVRs (ATMEGAxxU4)
* - Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2) - <i>8KB versions with reduced features only</i>
*
- * \section SSec_Info USB Information:
+ * \section Sec_Info USB Information:
*
* The following table gives a rundown of the USB utilization of this project.
*
* </tr>
* </table>
*
- * \section SSec_Description Project Description:
+ * \section Sec_Description Project Description:
*
* Firmware for an AVRStudio compatible AVRISP-MKII clone programmer. This project will enable the USB AVR series of
* microcontrollers to act as a clone of the official Atmel AVRISP-MKII programmer, usable within AVRStudio. In its
* - No reversed/shorted target connector detection and notification
* - A separate header is required for each of the ISP, PDI and TPI programming protocols that the user wishes to use
*
- * On AVR models with an ADC converter, AVCC should be tied to 5V (e.g. VBUS) and the VTARGET_ADC_CHANNEL token should be
+ * On AVR models with an ADC converter, AVCC should be tied to 5V (e.g. VBUS) and the \c VTARGET_ADC_CHANNEL token should be
* set to an appropriate ADC channel number in the project makefile for VTARGET detection to operate correctly. On models
* without an ADC converter, VTARGET will report a fixed 5V level at all times.
*
* </tr>
* </table>
*
- * In addition, the AVR's OCR1A pin will generate a .5MHz clock, to act as an external rescue device clock
- * if the fuses have been mis-set. To use the recovery clock, connect the OCR1A pin of the USB AVR to the target
- * AVR's XTAL1 pin, and set the ISP programming speed to 125KHz (note: other ISP speeds will not work correctly).
+ * In addition, the AVR's OCR1A pin will generate a 4MHz clock, to act as an external rescue device clock if the
+ * fuses have been mis-set. To use the recovery clock, connect the OCR1A pin of the USB AVR to the target AVR's
+ * XTAL1 pin, and set the ISP programming speed to 125KHz (note: other ISP speeds will not work correctly).
*
- * <b><sup>1</sup></b> <i>Optional, see \ref SSec_Options section - for USB AVRs with ADC modules only</i> \n
- * <b><sup>2</sup></b> <i>See AUX line related tokens in the \ref SSec_Options section</i>
+ * <b><sup>1</sup></b> <i>Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only</i> \n
+ * <b><sup>2</sup></b> <i>See AUX line related tokens in the \ref Sec_Options section</i>
*
* \section Sec_PDI PDI Connections
* Connections to the device for PDI programming (when enabled):
* </tr>
* </table>
*
- * <b><sup>1</sup></b> <i>Optional, see \ref SSec_Options section - for USB AVRs with ADC modules only</i> \n
+ * <b><sup>1</sup></b> <i>Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only</i> \n
* <b><sup>2</sup></b> <i>The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors</i> \n
*
* \section Sec_TPI TPI Connections
* </tr>
* </table>
*
- * <b><sup>1</sup></b> <i>Optional, see \ref SSec_Options section - for USB AVRs with ADC modules only</i> \n
+ * <b><sup>1</sup></b> <i>Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only</i> \n
* <b><sup>2</sup></b> <i>The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors</i> \n
- * <b><sup>3</sup></b> <i>See AUX line related tokens in the \ref SSec_Options section</i>
+ * <b><sup>3</sup></b> <i>See AUX line related tokens in the \ref Sec_Options section</i>
*
- * \section SSec_Options Project Options
+ * \section Sec_Options Project Options
*
* The following defines can be found in this project, which can control the project behaviour when defined, or changed in value.
*
* to the ADC. <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td>
* </tr>
* <tr>
+ * <td>VTARGET_USE_INTERNAL_REF</td>
+ * <td>Makefile LUFA_OPTS</td>
+ * <td>Selects the internal 2.56V ADC reference voltage, instead of using the AVR's VREF pin. When enabled, this option will
+ * override the VTARGET_REF_VOLTS configuration option. <i>Ignored when compiled for targets lacking an ADC, or when
+ * NO_VTARGET_DETECT is defined.</i></td>
+ * </tr>
+ * <tr>
* <td>VTARGET_SCALE_FACTOR</td>
* <td>Makefile LUFA_OPTS</td>
* <td>Indicates the target's supply voltage scale factor when applied to the ADC. A simple resistive divider can be used on the
* <td>Define to switch to a non-standard endpoint scheme, breaking compatibility with AVRStudio under Windows but making
* the code compatible with software such as avrdude (all platforms) that use the libUSB driver.
* </tr>
+ * <tr>
+ * <td>XCK_RESCUE_CLOCK_ENABLE</td>
+ * <td>Makefile LUFA_OPTS</td>
+ * <td>Define to move the ISP rescue clock to the AVR's XCK pin instead of the OCR1A output pin. This is useful for existing programming
+ * hardware that does not expose the OCR1A pin of the AVR, but *may* cause some issues with PDI programming mode.
+ * </tr>
* </table>
*/
projects / pub / USBasp.git / blobdiff